出典:Wiktionary
出典:『Wiktionary』 (2025/12/27 14:18 UTC 版)
From the oblique forms of 古期英語 sinu, seonu, from Proto-West Germanic *sinu, from Proto-Germanic *senawō, from Proto-Indo-European *snḗh₁wr̥; thus a doublet of nerve.
Some forms are influenced by Old Norse sin.